PRIMARY COIL/SUPPORTS
From the image above you can see that I used PVC as the form for the primary support structure. The copper pipe is 0.5 inch flat spiral wound with a small soldered join to enable me to obtain the longest possible length to allow for the greatest possible tuning variance. The PVC pipe was drilled with 0.5 inch drill bit then slotted with a saw where the slots were slightly narrower than the primary pipe. This allowed the pipe to be clamped in position when pushed through the slot into the drilled area. I used PVC because it was easy :-)), it allows for various shapes and structures to be constructed with a minimum of effort and it was cheap. The PVC form is screwed to the base in three different positions on each support.
This is the primary tap, the screw in the side of the tap is to tighten it further as it tends to loosen when I wind up the power :-)
The above image further displays the primary support structure, the primary coil itself, and the strike rail with it's support structure. The strike rail is imperative if you wish to avoid high voltages strikes from the top load to the primary coil where they are then conducted into the primary tank circuit. Note that the strike rail itself does NOT form a complete circle, it has a gap intentionally left in it's circumference so that it does not form an inductance which may interfere with the operation of the primary/secondary magnetic coupling.